feat: serve_image view and semantic image URLs for all image fields (RFC §12)

- IMAGE_FIELDS allowlist and serve_image view: cover CasaLegislativa.logotipo,
  Partido.logo_partido, Parlamentar.fotografia, Dispositivo.imagem.  The view
  validates the (app, model, field) triple, fetches the instance, and issues
  X-Accel-Redirect to nginx — same mechanism as serve_file but without
  FileMetadata involvement (images carry no versioning or access-control
  requirement).

- nginx: /media/CACHE/ added as a public exception before the internal
  /media/ block so sorl-thumbnail cached thumbnails (fotografia via
  {% cropped_thumbnail %}) remain accessible to browsers without going through
  Django.

- get_logotipo_url helper in sapl/utils.py: returns the semantic
  /imagens/base/casalegislativa/<pk>/logotipo/ URL; avoids circular imports
  since sapl/base/views.py imports from sapl/relatorios/views.py.

- LogotipoView updated to redirect to the semantic URL instead of the raw
  /media/ path.

- parliament_info context processor: adds logotipo_url to every template
  context so base.html and 404.html can render the logo without MEDIA_URL
  concatenation.

- 5 HTML templates updated: {% if logotipo %}{{ MEDIA_URL }}{{ logotipo }}
  replaced with {% if logotipo_url %}{{ logotipo_url }}.

- relatorios/views.py (4 sites): logotipo_url added to header_context dicts
  passed to header_ata.html.

- painel/views.py: brasao computed via get_logotipo_url instead of
  casa.logotipo.url (which returns the now-internal /media/ path).

- ImageThumbnailFileInput.get_context: computes semantic_url from IMAGE_FIELDS
  when the instance has a PK; image_thumbnail.html uses it as the src fallback
  so the edit-form preview remains visible after /media/ became internal.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker/config/nginx/sapl.conf

@@ -49,6 +49,10 @@ server {
         alias  /var/interlegis/sapl/collected_static/;
     }
 
+    location /media/CACHE/ {
+        alias  /var/interlegis/sapl/media/CACHE/;
+    }
+
     location /media/ {
         internal;
         alias  /var/interlegis/sapl/media/;

sapl/base/views.py

@@ -1513,8 +1513,8 @@ class LogotipoView(RedirectView):
 
     def get_redirect_url(self, *args, **kwargs):
         casa = get_casalegislativa()
-        logo = casa and casa.logotipo and casa.logotipo.name
-        return os.path.join(settings.MEDIA_URL, logo) if logo else STATIC_LOGO
+        url = get_logotipo_url(casa)
+        return url if url else STATIC_LOGO
 
 
 def filtro_campos(dicionario):
@@ -1664,3 +1664,46 @@ def serve_model_file(request, app_label, model_name, pk, field_name):
         raise Http404
 
     return serve_file(request, file_uuid=meta.uuid)
+
+
+# Image fields served via X-Accel-Redirect — same nginx internal mechanism as
+# serve_file but without FileMetadata involvement (images carry no versioning or
+# access-control requirement).  An explicit allowlist prevents arbitrary ORM
+# traversal (RFC §12.3).
+IMAGE_FIELDS = frozenset([
+    ('base',          'casalegislativa', 'logotipo'),
+    ('parlamentares', 'partido',         'logo_partido'),
+    ('parlamentares', 'parlamentar',     'fotografia'),
+    ('compilacao',    'dispositivo',     'imagem'),
+])
+
+
+def serve_image(request, app_label, model_name, pk, field_name):
+    """
+    Serve an image field via nginx X-Accel-Redirect (RFC §12.4).
+
+    All four image field models are unconditionally public — no permission
+    check is performed.  The allowlist is the only gate.
+    """
+    from django.shortcuts import get_object_or_404 as _get_or_404
+
+    if (app_label, model_name, field_name) not in IMAGE_FIELDS:
+        raise Http404
+    try:
+        model = apps.get_model(app_label, model_name)
+    except LookupError:
+        raise Http404
+
+    instance = _get_or_404(model, pk=pk)
+    field_file = getattr(instance, field_name, None)
+    if not field_file:
+        raise Http404
+
+    response = HttpResponse()
+    response['X-Accel-Redirect'] = f'/media/{field_file.name}'
+    return response
+
+
+def get_logotipo_url(casa):
+    from sapl.utils import get_logotipo_url as _get_logotipo_url
+    return _get_logotipo_url(casa)

sapl/context_processors.py

@@ -9,11 +9,13 @@ from sapl.utils import mail_service_configured as mail_service_configured_utils
 
 def parliament_info(request):
     from sapl.base.views import get_casalegislativa
+    from sapl.utils import get_logotipo_url
     casa = get_casalegislativa()
     if casa:
-        return casa.__dict__
-    else:
-        return {}
+        ctx = dict(casa.__dict__)
+        ctx['logotipo_url'] = get_logotipo_url(casa)
+        return ctx
+    return {}
 
 
 def mail_service_configured(request):

sapl/painel/views.py

@@ -22,7 +22,7 @@ from sapl.sessao.models import (ExpedienteMateria, OradorExpediente, OrdemDia,
                                 PresencaOrdemDia, RegistroVotacao,
                                 SessaoPlenaria, SessaoPlenariaPresenca,
                                 VotoParlamentar, RegistroLeitura)
-from sapl.utils import filiacao_data, get_client_ip, sort_lista_chave
+from sapl.utils import filiacao_data, get_client_ip, sort_lista_chave, get_logotipo_url
 
 from .models import Cronometro
 
@@ -555,7 +555,7 @@ def get_dados_painel(request, pk):
 
     brasao = None
     if casa and app_config and (bool(casa.logotipo)):
-        brasao = casa.logotipo.url \
+        brasao = get_logotipo_url(casa) \
             if app_config.mostrar_brasao_painel else None
     
     response = {

sapl/relatorios/views.py

@@ -51,7 +51,7 @@ from sapl.sessao.views import (get_identificacao_basica, get_mesa_diretora,
 from sapl.settings import MEDIA_URL, RATE_LIMITER_RATE
 from sapl.settings import STATIC_ROOT
 from sapl.utils import LISTA_DE_UFS, TrocaTag, filiacao_data, create_barcode, show_results_filter_set, \
-    num_materias_por_tipo, parlamentares_ativos, MultiFormatOutputMixin, ratelimit_ip
+    num_materias_por_tipo, parlamentares_ativos, MultiFormatOutputMixin, ratelimit_ip, get_logotipo_url
 from .templates import (pdf_capa_processo_gerar,
                         pdf_documento_administrativo_gerar, pdf_espelho_gerar,
                         pdf_etiqueta_protocolo_gerar, pdf_materia_gerar,
@@ -1460,8 +1460,8 @@ def resumo_ata_pdf(request, pk):
             'decimo_quinto_ordenacao': 'ocorrencias_da_sessao.html',
             'decimo_sexto_ordenacao': 'consideracoes_finais.html'
         })
-    header_context = {"casa": casa,
-                      'logotipo': casa.logotipo, 'MEDIA_URL': MEDIA_URL}
+    header_context = {"casa": casa, 'logotipo': casa.logotipo,
+                      'logotipo_url': get_logotipo_url(casa), 'MEDIA_URL': MEDIA_URL}
 
     html_template = render_to_string('relatorios/relatorio_ata.html', context)
     html_header = render_to_string(
@@ -1487,6 +1487,7 @@ def cria_relatorio(request, context, html_string, header_info=""):
     context.update({'rodape': rodape})
 
     header_context = {"casa": casa, 'logotipo': casa.logotipo,
+                      'logotipo_url': get_logotipo_url(casa),
                       'MEDIA_URL': MEDIA_URL, 'info': header_info}
 
     html_template = render_to_string(html_string, context)
@@ -1713,6 +1714,7 @@ def relatorio_sessao_plenaria_pdf(request, pk):
     html_header = render_to_string('relatorios/header_ata.html', {"casa": casa,
                                                                   "MEDIA_URL": MEDIA_URL,
                                                                   "logotipo": casa.logotipo,
+                                                                  "logotipo_url": get_logotipo_url(casa),
                                                                   "info": info})
 
     pdf_file = make_pdf(
@@ -1795,8 +1797,8 @@ def relatorio_materia_tramitacao(request, pk):
     'rodape': rodape,
     'data': dt.today().strftime('%d/%m/%Y'),
     'rodape': rodape})
-    header_context = {"casa": casa,
-                      'logotipo': casa.logotipo, 'MEDIA_URL': MEDIA_URL}
+    header_context = {"casa": casa, 'logotipo': casa.logotipo,
+                      'logotipo_url': get_logotipo_url(casa), 'MEDIA_URL': MEDIA_URL}
 
     html_template = render_to_string(
         'relatorios/relatorio_materia_tramitacao.html', context)

sapl/templates/404.html

@@ -49,7 +49,7 @@
         <div class="container">
           <div class="navbar-header">
             <a class="navbar-brand" href="/">
-              <img src="{% if logotipo %}{{ MEDIA_URL }}{{ logotipo }}{% else %}{% webpack_static 'img/logo.png' %}{% endif %}"
+              <img src="{% if logotipo_url %}{{ logotipo_url }}{% else %}{% webpack_static 'img/logo.png' %}{% endif %}"
               alt="Logo" class="img-responsive visible-md-inline-block visible-lg-inline-block" >
               <span class="vcenter">
                 {# XXX Make better use of translation tags in html blocks ie. actually use the proper blocktrans tag efficiently #}

sapl/templates/base.html

@@ -117,7 +117,7 @@
           <div class="container">
             <div class="navbar-header">
               <a class="navbar-brand" href="/">
-                <img src="{% if logotipo %}{{ MEDIA_URL }}{{ logotipo }}{% else %}{% webpack_static 'img/logo.png' %}{% endif %}"
+                <img src="{% if logotipo_url %}{{ logotipo_url }}{% else %}{% webpack_static 'img/logo.png' %}{% endif %}"
                 alt="Logo" class="img-responsive" >
                 <span class="vcenter">{% if nome %}{{ nome }}{% else %}{% trans 'Câmara/Assembléia não configurada'%}{% endif %}
                   <br/><small>{{nome_sistema}}</small>

sapl/templates/materia/recibo_proposicao.html

@@ -24,7 +24,7 @@
     <tr>
       <td>
         <img height="100" width="100"
-             src="{% if logotipo %}{{ MEDIA_URL }}{{ logotipo }}{% else %}{% webpack_static 'img/logo.png' %}{% endif %}"
+             src="{% if logotipo_url %}{{ logotipo_url }}{% else %}{% webpack_static 'img/logo.png' %}{% endif %}"
              alt="Logotipo"
              class="img-responsive visible-lg-inline-block vcenter">
         <div>

sapl/templates/protocoloadm/comprovante.html

@@ -50,7 +50,7 @@
 				<div class="row">
 					<div class="col-1">
 						<img height="90" width="90"
-								src="{% if logotipo %}{{ MEDIA_URL }}{{ logotipo }}{% else %}{% webpack_static 'img/logo.png' %}{% endif %}"
+								src="{% if logotipo_url %}{{ logotipo_url }}{% else %}{% webpack_static 'img/logo.png' %}{% endif %}"
 								alt="Logotipo"
 								class="img-responsive visible-lg-inline-block vcenter">
 					</div>

sapl/templates/relatorios/header_ata.html

@@ -15,7 +15,7 @@
     <section id="informations">
         <dl>
             <dt class="image-header"> 
-                <img style="max-height:2cm;max-width:2cm" src="{% if logotipo %}{{ MEDIA_URL }}{{ logotipo }}{% else %}{% webpack_static 'img/logo.png' %}{% endif %}">
+                <img style="max-height:2cm;max-width:2cm" src="{% if logotipo_url %}{{ logotipo_url }}{% else %}{% webpack_static 'img/logo.png' %}{% endif %}">
             </dt>
             <dd class="title">
                 <ul>

sapl/templates/widgets/image_thumbnail.html

@@ -22,10 +22,10 @@
     <div class="controls {{ field_class }}">
         <div class="fileupload fileupload-new"
             data-provides="fileupload">
-            {% if widget.value.url %}
+            {% if widget.semantic_url or widget.value.url %}
                 <div class="row">
                     <div class="col-md-12">
-                        <img src="{{ widget.value.url }}"
+                        <img src="{{ widget.semantic_url|default:widget.value.url }}"
                           height="300" width="300"
                           alt="{{ widget.value }}" class="img-thumbnail"/>
                     </div>

sapl/urls.py

@@ -21,7 +21,7 @@ from django.urls import path
 from django.views.generic.base import RedirectView, TemplateView
 from django.views.static import serve as view_static_server
 
-from sapl.base.views import serve_file, serve_model_file
+from sapl.base.views import serve_file, serve_image, serve_model_file
 
 import sapl.api.urls
 import sapl.audiencia.urls
@@ -88,6 +88,10 @@ urlpatterns += [
     path('<str:app_label>/<str:model_name>/<int:pk>/<str:field_name>/download',
          serve_model_file, name='serve_model_file'),
 
+    # Semantic image URL: /imagens/<app>/<model>/<pk>/<field>/
+    path('imagens/<str:app_label>/<str:model_name>/<int:pk>/<str:field_name>/',
+         serve_image, name='serve_image'),
+
 ]
 
 

sapl/utils.py

@@ -334,6 +334,27 @@ class SaplGenericRelation(GenericRelation):
 class ImageThumbnailFileInput(ClearableFileInput):
     template_name = 'widgets/image_thumbnail.html'
 
+    def get_context(self, name, value, attrs):
+        ctx = super().get_context(name, value, attrs)
+        if value and hasattr(value, 'instance') and hasattr(value, 'field'):
+            instance = value.instance
+            if instance and instance.pk:
+                field_name = value.field.name
+                app = instance._meta.app_label
+                model = instance._meta.model_name
+                try:
+                    from django.urls import reverse
+                    from sapl.base.views import IMAGE_FIELDS
+                    if (app, model, field_name) in IMAGE_FIELDS:
+                        ctx['widget']['semantic_url'] = reverse(
+                            'serve_image',
+                            kwargs={'app_label': app, 'model_name': model,
+                                    'pk': instance.pk, 'field_name': field_name}
+                        )
+                except Exception:
+                    pass
+        return ctx
+
 
 class RangeWidgetOverride(forms.MultiWidget):
 
@@ -1180,6 +1201,22 @@ def from_date_to_datetime_utc(data):
     return dt_utc
 
 
+def get_logotipo_url(casa):
+    """Return the semantic /imagens/ URL for casa.logotipo, or None."""
+    if not (casa and casa.logotipo and casa.pk):
+        return None
+    try:
+        from django.urls import reverse
+        return reverse('serve_image', kwargs={
+            'app_label': 'base',
+            'model_name': 'casalegislativa',
+            'pk': casa.pk,
+            'field_name': 'logotipo',
+        })
+    except Exception:
+        return None
+
+
 class OverwriteStorage(FileSystemStorage):
     """
     Solução derivada do gist: https://gist.github.com/fabiomontefuscolo/1584462